Insulated casing



' P. OVERTON INSULATED CASING Dec. 21 1926. I 1,611,317

Filed Au ust 12, 1925 2 Sheets-Sheet 1- 1,611,317 P. OVERTON INSULA'LE-D CASING Dec. 21 1926.

1925 ts-Sheet 2 Filed August 12 lad e OverZaza,

Patented Dec. 21, 926'.-

' uNf'T-En STATES PATENT OFFICE:

PLATTE OVERTON, or BLOOMINGTQN, ILLINoIs- AssIGNoa To a H; MAeimL FOUNDRY I AND FURNACE WORKS, or BLOOMINGTON, ILLINOIS. I

INSULATED CASING.

Application filed August 12, 1925. SeriaL No. 49,813.

The present invention relates to insulated caslngs'and is primarily directed to a casing of this character for use in connection with.

furnacesl f It is a common practice in the'hot air by more orless inexperienced workmen with- I out the aid of any special tools.- v -A further purpose isthe provision of in sul'ated sections which, when assembled, pre- -.ventheat'losses'that are common with the brick wall casings and thereby increase the 't'emperature within the casing or plenum chamber. It is also intended to casing sections, or at leastinterchangeable, thus aiding not o manufacture, but also in setting up the ca sin". r

iknother feature of the casing is its simplicity of design-and the attractive external of them,

appearancewhich it presents. This is due to the construction and the nianner in which the casing sections or panels are connected together.

Reference is had to the accompanying drawings, showing a practical embodiment of the invention, and wherein- Figure 1, represents a .perspective view of the casing, certain portions whereof are broken awayto wore clearly show the 'internaleonstruction; v j I Fig. ,2, a perspective view of the panshaped members of one of the panels ofthe preferred for m disassembled; Fig. 3, a horizontal'section taken on line 33 of Fig! 1- showing the manner in which the Nertical side anelsare connected to each ther, and to the rear panels, the insulating jate'ri ;al in the panels being shown only in an, of thisview atld omitted from the ther' v'iew for gthe sake of clearness;

1 ve i'eal section on line'H of "losing'f themannerin which the side panels are. connected tothe top of-the casing and to the base rail;

F1g. 5, an enlarged horizontal sectional view of the 1joint between the panels;

Fig. 6, a

rangement of the adjoining side panel and the ornamental front of one of the furnace units;

Rig. 7, a vertical section on line 7-7 of Fig. 1 showing the relation of the ornamental front of one ofthe furnace units and the overlying front anel;

Fig. 8, an en arged perspective view of certain of the members used for connecting the. panels together;

Fig. 9, a horizontal section taken online 99 of Fig. 1, certain of the parts being omitted; v

10, a fragmentary plan View of the joint between the adjoimng'top panels;

Fig. 11, a vertical section on line 11-11 of Fig..10;'- l

' Fig. 12, a transverse vertical section of a modified form of panel;

ioriz'ontal section'taken on line 6+6 of Fig. 1 and showing the relative ar- Fig. 13, a fragmentary longitudinal vertical section of the same panel, showing the construction at one end of. the panel of which pr'xiamental front '4. The furnace fronts are each pirovided, of course. with the usual ash-pit door 5, fire-box door 6, clean-out door 7 and such other'accessories as may be desired. Instead of the three furnace units illustrated, a single unit or any number of units may be used, the size of the casing varying accordingly.

' The casing, as is obvious, encloses the furnace units at their sides, rear and above and is\ spaced from the units so as to, form the usual. hot air or plenum ,chamber 8. Suitable openings for the connection of air .duots or flues are shown at 9 and 10." The (I detailed construction of these openings be described later. 1

Extending back from the furnace fronts will . the rail;

'sides and back of the casing.

on both sides and across the back of the furnace units is a cast-iron base-rail 11. The

base-rail is of channel-shape and is disposed Resting on their lower edges on flange 13 of the base-rail are insulated panels or casing sections 15 which form the As shown v most clearly in Figs. 2 and 4, these panels consist of a pair of pan-shaped, rectangular sheet-metal members nested toget pi with the sides of the inner member 16 and those of the outer member 17 extending in the same direction and with their outer edges flush with each other. Inner panshaped, member 16 is made shallower than member 17 thus-leaving space between the bottoms "of the p an-shapedmembers for a quantity of insulating material- 18 which is placed therein before the members are as sembled. Insulating material 18 between the panel members is only shown in Fig. 3, but it is to be understood that .it is placed between the bottoms of all of the panshaped members forming the casing panels.

The sidesof the pan-shaped members 16 and 17 are spot-welded together thereby forming the panel 15 into a'practically unitary structure. The continuous flange 19 formed on the inner face of each panel. 15 by the sides of the pan-shaped members 16, 17 is utilized for securing'the panel in place to form the casing as will appear later. a

Upon reference to Figs. 2 and 4; it will be seen that the outer an-sha'ped member 17 of each of the panels is provided on the outer side of its bottom-wall with a continuous groove 20, slightly spaced from the edges'of the member.. The portion of the bottom wall of member 17 between the groove 20 and the 'side walls of, the member is depressed with reference to the main central portion of the bottom wall. This is forthe purpose of receiving the channel iron or fastenin strip 21, so that the outer face of member 21 will lie substantially flush with the central portion of the pan-shaped.

in the ,outerface of base rail 11, thus forming an interlock between these parts. The flange 19 on the-inner side of panel 15 extends substantially flush with the inner 'edge of the upper flange 13 of base rail'11' and the two flanges are. coupled together by means of 'a channel iron or fastening strip 22 of the same general character as channel member 21, but smaller. Channel strip 22 the upper is providedat suitable ,intervals with threaded 'perforations'and channel member'21 is, provided with 1 registering perforations. Screw bolts 23 are insertetl in the openings in the channel strips, the upper flange-13 m of base rdil ILbeing grooved to permit passage of the bolts. The channel strips are then drawn tdgether by means'of the bolts so as to securely clamp the panel 15 in a; rigid, upright position'on' the base rail'll.

- The manner of connecting the adjoining upright side panels 15 to each other'is practically the same as thatdescribed with referenceto the panels and the base rail. This joint is best shown atthe lefthand side of so Fig. 3. The upright side panels 15 are mounted on th upper flange of'base rail '11 and are spaced a slight distance apart at their'vertical edges-when channel strips 21 and 22 are in place. This'spacing is for the B5 purpose of permitting the screw bolts 23 to pass between the panels. When the boltsare in place they are drawn up and the panels are thus interlocked firmly with each other. The interlock described not only serves.to 1w maintain the. panels 15 rigidly in position. but also forms gas tight joints between all ofthe parts. v 3

Fig. 3, at the right hand side thereof, shows the connection between the side pan- 9 elsand the rear anels. The outermost rear panel 15 is of t e same construction as the \upright side panelsexcept along the ed c thereof which adjoins the side panel. n this edge, asv shown in Fig.- 3, the groove 1"" '24 for receiving, one flange of the channel I strip 21 is formed on the edge of the panel, instead of on the outer 'face thereof. Channel, strip 21 serves to interlock these panel members 15 in thesame manner as de- 105.

scribed with reference to the side panel members, except that short screw bo ts 25 areused which at their inner ends engage v with threaded perforations in an angle strip 26- spot-welded in place within the rear 1 panel. The interlockingchannel strip on the inside of the casing is omitted at this joint. In order, however, to maintain the side panel in position from the inside of the casing, the rear panel isprovided with an inwardly rejecting flange 27 against which the inwar ly projecting flange 19 of the slde panel abuts. 'The'jointbetween the foremost side panel and the ornamental front of an outside fur- .1 'nace unitis shown in Fig. 6. Secured by means of bolts on the inner side of the ornamental front 4 is an angle iron 28 which serves to hold the side panel in proper posit-ion from within .the casing. I The same bolts also serve to cdnnect a. cast iron strip 29 to the outer edge of the ornamental. front 4. Strip 29 is provided with a longitudinal- 1y extending groove 30 in which rests'one' of the flanges f the channel strip 21, while the lnnerand outer channel strips 21,'22 used in connecting the side panels, are utilized at this point, but instead of connecting two insulated panels, they serve to connect a single panel to a cast-iron ornamental furnace front member 32. Member 32 is protively.

sided with a longitudinally disposed groove 33 in its outer face to receive one flange of channel strip 21 and on its rear side has a flange 34 which is engaged by the lower flange of channel strip 22, member 32 being grooved at intervals on 'its upper side to permit passage of the screw bolts 23.

In Fig. 5, is shownthemanner of connecting the panels Which form the top of the casing, this joint being the-same as that de-, scribed ini'connection with the adjoining'up right side panels. Atthe upperpart of Flg. 1 is shown the joint between the side panels and the top panels, this joint being the same as that between the side panels and the rear panels, hereinbefore described.

In Fig. 4 there is also shown the manner in which openings for air ducts and the like ape formed in the panels 17, opening being the particular one illustrated in-this figure, The inner. and outer pan-shaped members 16, 17 are formed in the usual manner, except that they are provided with the opening 10 therethrough. Members 16, 17 are provided about opening 10 with outwardly rojecting flanges 35 and 36 respec ocated Within panel between the inner and ,outer faces thereof and completely surrounding the opening 10 is a continuous cast-iron channel member 37 Member 37 I is h ld in place by means of the insulating structure.

mat :lal within the panel 15 and also by .means of a continuous rectangular sheet metal member 38 which completely surrounds the opening 10 and is itself held in place by being spot-welded'to the flanges and 36.

Certain of the channel -str ips21 and 22 aremade ofa length so that theywill serve to join together more than a single pair of the interlocked panels 15 or panels 15 and some other art of the casing of furnace or instance, it has been found desirable, to make these strips where they join the side panels and rear panels 15 to the base and the vertically disposed side panels 15 to the upper side panels, of a length suflicient to join all of these members'together. In other words, the lowermost and intermediate horizontal members 21, 22 on the sides and ba'ckof the casing each extends the full length of the corresponding wall of theycasing. In. other places, it has been found more practical to se short channel strips which serveto co-n ect only a single; pair of adjoining parts. Wher e a channel strip of the first-n'ientioned character is'used, as showmin Fig. 9, the outer channel strip 21 has its flanges notched at 39' to accommo-' els 15 and thus permit the outer face of the 1 date the depressed edge portions of the panchannel strip 21 to lie flush with the outer faces of the adjoining'panels. v

In order to firmly clamptheextremities of the channel members 21 and 22 in place on the anels 15 forming the top of the casing and thus provide a'rigid construction, as "shown in Figs. 10 and 11, inner and outer cruciform plates 40, 41 are provided. These plates are drawn together by means of a bolt 42' passing between the adjoining panels.

Somewhat similar plates 43 (Figure 8), only T-shaped instead of cruciform, are employed for the same purpose where there are three panels 15 or panels 15 and othermem bers, in interlocked relation, instead of four members as in the'construction'of the top of the casin Instead o formin' the panels 15 of a pair of pan-shaped members, it has been found practical to form these panels from a single sheet of metal which may be stamped and bent into form, as shown in Figs- 12, 13 and 14. The modified panel 15' shown in these figures is practically the same as the prin-,

cipal form, except that the inner pan-shaped portion 16' instead of being separate from the outer portion 17 of the panel, is formed by providing an extension 16' on one side of the outer portion 17 of the panel. The other three sides of the outer portion-17'- are also extended at their upper edges. The insulated material 18 is placed in the outer portion 17' of the panel and extenslon 16' 's then folded down into lace, after which the upper extensions of the other three sides of the outer portion 17 are folded down so as to interlock with the upstanding sides of the extension 16, "as shown in Figs. 12 and 13. i A panel practically as unitary as the two-part welded panel is thus produced, both forms of the panel being especiallyadapted for use in furnace casing constructions due to their low heat conductivity. p g

The mode of joining the ,Various parts of the casing together and to the other parts of the structure not only furnishes gas tight joints atall points, but a'structureof materially improved appearance is prov ded.

What'I claim is: f

1. A furnace casing panel compris ng a pair of nested pan-shaped members having her being of i1 greater depth than the inner on said faces with marginal flangesv in enits bottom "wall.

walls of the nested members.

member and having'a marginal groovein gageme'nt with the legs of the connecting, the outer face of its bottom wall, and insustrip and so located as to permit-the base of lating material disposed between the bottom the strip to lie in the planeof said faces of i the casing members. Tu 2.'A. furnace casing panel comprising a S. In a furnace casing the combinatipn of x pair of nested pan-shaped members having a pair of adjoining casing members having their sides extending in the same direction their outer faces lying in the same plane, said and spot-welded; to, eaclr other,the 'outer outer faces being provided with marginal membei' being a greaterdepththan the inner flanges on their adjoining edges, a connectmember and having a continuous marginal ing stripfU-shaped in cross-section, having groove in the outer face of its bottom wall its legs in engagement with said flanges and around the edges thereof, and insulating wa its base flush with said outer faces'of the terial disposed between the bottom Walls of casing members, and means for securing said 1 strip in place.

the nested members. i

3. A furnace casing panel comprising a 9. In a furnace casing the combination of pair of nested pan-shaped members "having a pair of adjoining casing members, said their sides extend n in the same direction .members b8111 rovided at their ad 0111111 1 a h o and sei'u'redto each other,the outer member edges with marginal flanges on their inner n being of a greater depth than the inner and. outer faces, an outer channel strip'ha'vmember and having a marginal groove in ing its legs in engagement with the outer its bottom wall disposed along. but spaced flanges of said casing members, an inner from an edge of said bottom wall, and, inchannel strip having its legs in engagement sulating materialdisposed'between the botwith the inner flange of said members, and tom walls of the nested members, saidouter means for securing said channel strips n .member-also being formed with a depressed place.

marginal portion between the groove and 10. In a furnace casing the combination of said edge of its bottom wall. a casing member Having a marginal flange, 4. A furnace casing panel comprising a a plurality of easing members each having pair of nested pan-shapedmembershaving a face lying in a common plane, said faces their sides'extending-in the same direction being provided with marginal flanges alined and secured to each other, the outer member with each other and adjoining the marginal being of a greater depththan the inner; flangeof said first-mentioned casing member, member and having a continuous marginal and -a channel strip having one of its legs groove in its bottom wall disposed along ingengagement with the flange of the firstbut spaced from the edges of ,said bottoin mentioned casingmember-and its other leg wall, and insulating material disposed bein: engagement with the alined flanges of tween the bottom walls of the nested mem said second-mentioned casing members. bers,'said outer member also being formed 11. In a furnace casing the combination with a continuousdepressed marginal porof a plurality of easing panels lying in the tion between said groove and the edges of s e plane and having adjoining mar inal flanges on their inner and outer faces, c an- 5. Alfurnace casing panel one? cc of nel stripsfin interlocking engagement with which is provided with a m'arg'ina ange said flanges to connect said casing members I arranged substantially perpendicularto said together, inner and outer plates engaging the no face, he outer edge of said flange being ends of said channel-strips onthe inner and locate between the plane of said face-bf Outer faces of the casing panels, and means the panel and the connection ofsaid flange connecting said plates together.

:fapair of adjoining *faces"thereof f lying in the same plane, a the inner paneliflanges, and means eonnect-' with'the anel. 12. A furnace casing comprising a chan- 6. A rnace casing panel one face of nel base rail provided with a marginal which is provided with an endless marginal flange on the outer face of its base, a pluflange arranged substantiallyperpendicular rality of easing panels resting on edge on a to said face, the outer edge of said flange leg-of said base rail, each of said panels being located between the plane of said face having an outer marginal flange a'djoining of the panel and' the connection of said the flange on the base rail and an inner marflange with the panel, the opposite face of ginal flange adoining said base rail leg, a

' the panel also being provided with an endchannel strip in inter-locking engagement ,less' marginal flange.

4 with the base rail flange and the outer panel 7. In a furnace caspg the combinat on of flanges, a second channel strip in inter-locksing members having ing engagementiwith said base rail leg' and connecting s1 :'ri g v U-shaped in cross-section, ing said channelstrips together.

I ed'at the adjoining edges of said casing 13. In a furnace casing the combination mbers, and means for securing said strip of a pair of easing members having adjoinin place, thefasing members belng provided ing edges, one of said members being provided on its outer face with a marginal flange, means connected to said first-mentioned member vand having inter-locking engagement with the flange ofthe firstmentioned member to connect said members together.

14. In a furnace casing the combination of a pair of easing members having adjoining edges, said members being provided on their outer faces with marginal flanges, a channel strip in inter-locking engagement with' said flanges, and means on the inner face of one of said members engaging with the other of said members to prevent inward displacement of the latter.

15. In 'a furnace casing the combination of a plurality of casing panel members having their outer faces lying in the same plane and inter-locking members for the adjoining edges of the panel members, the outermost faces of said inter-locking members lying substantially "in theplane of the outer faces of the panel members.

16. A panel for furnace casings comprising a pan-shaped sheet "metal body a side wall whereof is extended to form a pan-- shaped portion of less depth than the body of the panel, said pan-shaped portion being nested in and secured to the sides of the body, and insulating material located bebody, the other side walls of the bod shaped tween the bottom walls ofythe pan-shaped portion and the body of the panel.

17. A panel for furnace casings comprising a pan-shaped sheet metal body a side wall whereof is extended to form a pansha ed portion of less depth than the body of t e panel, said pan-shaped portion being nested in the body of the panel, and insulating material located between the bottomwalls of the pan-shaped portion and the ing extended and folded over'into inter ockmg pan-shapedportion of the panel.

18. A furnace casing panel comprising an outer pan-shaped member, an inner panmember nested in said outermember withthe sides of both of said members extending in the same direction, the outer member being of, a greater depth than. the inner member,'and insulating materialcdis posed between the bottom walls of the nested members, the free edges of the outer member being folded into interlocking relaltoion with the free edgesof the inner memer. In ,testimony whereof I have signed my name to this specification.

PnA 'r'rE ovnn'ron;

engagement with the side walls of the 

